Merge "Polish the back to home gesture animation to match the spec." into tm-dev am: cf806451

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17646341



Change-Id: I470a69dba7617295674444efc74a9c4f9c2e2e4f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>